Franz windhausen



(No Model.)

F. WINDHAUSEN. APPARATUS FOR OOMPRESSING GARBONIO A011) GAS.

No. 405,289. Patented June 18, 1889.-

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FRANZ lVlNDHAUSEN, OF BERLIN, GERMANY.

APPARATUS FOR COMPRESSING CARBONIC-ACID GAS.

SPECIFICATION forming part of Letters Patent No. 405,289, dated June 18, 1889.

Application filed November 12, 1886. Serial No..2l3,729- (No-model.)- Patented in Germany August 22, 1885, No. 37,214; in

France December 3, 1885, No. 172,692: in Belgium December 15, 1885, No. 71,047, and in Austria-Hungary December 20, p

1886, No. 84,528 and No. 63,576.

.To all whom it may concern.-

Be it known that I, FRANZ WINDHAUSEN, of Berlin, in the Kingdom of Prussia and German Empire, have invented a new and useful Apparatus for Compressing Carbonic Acid, (no patents being obtained by me anywhere for this invention, save in Austria- Hungary, Nos. 34,528 and (53,576, dated Dccember 20, 1886; Germany, No. 37,214, August 22, 1885; France, No. 172,692,December 3, 1885, and Belgium No. 71,047, December 15, 1885,) of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to an improvement in air-pumps for compressing air and gases of anykind in refrigerating-machines, and is especially adapted for forcing carbonic acid to be used as a cold-producing medium; and it consists in the peculiar construction and combination of devices hereinafter described and claimed.

The accompanying drawingis a vertical sectional View of a pump embodying my improve ments.

The body of the pump, which is made of steel or iron, has a pair of cylindrical cavities A A arranged side by side and communicating at their lower ends.

A piston-rod B is in the cavity A and has a piston at its lower end provided with suitable packing fitting in said cavity or cylinder. A cylindrical recess is formed in the lower end of the piston and communicates with the annular space between the cylinder A and the piston-rod by a channel h. A spring-pressed upwardly-closing valve g is seated in the said recess of the piston, as shown. The upper end of the cylinder A is enlarged in diameter, and in the same is fitted a gland K, through which the piston-rod passes. A stuffing-box is in the upper end of the gland, and on the lower portion of the latter is formed an annular chamber 0%, which surrounds the piston-rod. An. air-channel q communicates with the said chamber, and in said channel is a stopcock. The lower end of the gland has a packing e' to effect as tight a joint as possible with the piston-rod. A

channel p communicates with the chamber m and with a recess m, which in turn communicates with the cylinder A and in the said channel 19 is located a pointed screw valve or cock 0. A spring-pressed valve n, which is normally closed and opens inwardly, is seated in a gland screwed into the recess m. An inlet-pipe Q communicates with a chamber a at the upper end of cylinder A, and an outlet-pipeP communicates with a channel 0, that is in communication with said cylinder.

at represents a downwardly-opening valve seated in a gland a that extends through and communicates with the chamber a, and also communicates with the cylinder A. A spring presses upward on a head or nut on the stem of the valve (1, as shown, and keeps the valve normally closed.

1) represents a spring-pressed valve that serves to normally close the channel 0- and is seated in a gland, as shown. A channel 6 ertends from the chamber a to the channel 0, and is normally closed by a screw-plug d.

The operation of my invention is as follows: A quantity of suitable fluid is introduced to the cylinder A A and over which the air, gases, or carbonic acid to be compressed are sucked through the pipe Q by the valve a when the piston ascends, and when the piston descends said air, gas, or carbonic acid is compressed by the rising column of fluid in the cylinder A and driven past the valve 19 into the channel 0, and from thence through the pipe P into the receiver of the refrigerating-machine. The fluid is supplied in such quantities that when the piston is at the lower limit of its stroke the cylinder A will be entirely filled and cause the air, gas, or carbonic acid to be entirely expelled from said cylinder. Any fluid which may be driven into the channel 0 will be caused to flow by the recurring strokes of the piston through the channel 6 into the chamber a, and from thence will be sucked with the air, gas, or acid through the valve a back into the cylinder A.

On the column of fluid below the piston in the cylinder A is a lubricating-fluid of suitable kind. Any of said lubricant which may be forced into the part of cylinder A above the piston will, on the ascent of the latter, be forced downward through the channel 7L and valve g into .the lower part of the cylinder. Any lubricating-fluid which may be forced into the chamber at at the upstroke of the piston will be sucked downward therefrom through the channel 1) and valve n back into the cylinder on the ensuing downstroke of the piston. The height of the cylinder A and its capacity are such that the pressure of air which may be sucked therein through the valve u will be less than the pressure under the piston.

From the foregoing description it will be understood that the piston and piston-rod are at all times lubricated, and therefore no special oiling of the apparatus is required. It will be further understood that none of the compressing-fluid can escape, and that the air, gas, or carbonic acid, being prevented from coming in contact with the piston by the compressing-fluid, will remain entirely pure and will not be vitiated by the pump.

In order to maintain the pump at any desirable temperature, the same is provided with a surrounding case D, between which and the pump is formed a chamber, in which water may be caused to circulate.

A pump thus constructed is exceedingly compact, is very strong and durable, and may be operated at comparatively small expense.

Having thus described my invention, I claim- 1. The combination of the pump-body hav ing the piston-cylinder, the channel 1), communicating therewith, the valve n, the gland K, having the channel m, communicating with the channel 27 and having the outlet-channel q, the piston-rod in the piston-chamber and extending through the gland, and the packing i in the lower end of the gland, substanti ally as described.

2. In an air-pump, the combination of the body having the cylinder, the chamber a, communieatin g therewith, the escape-channel c, and the channel c between the same and chamber a", with the inlet-pipe communicat ing with said chamber, the inlet-valve (I, the outlet-valve l) in channel (2, and the compressiiig-pisjxim, substantially as described.

FRAN Z \VI N l') I IAUSEN.

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